var Qs_Lock = qs.createObject();

Qs_Lock.prototype = {

    _resourceName: null,
    _objectId: null,
    _refreshTimeout: 60 * 1000,
    _url: null,
    _timestamp: 0,
    _timer: null,

    initialize: function (options)
    {
        if (typeof options != 'object') {
            alert('Lock Object Data is wrong');
            return false;
        }

        if (!this._setResourceName(options.resourceName)) {
            return false;
        }

        if (!this._setObjectId(options.objectId)) {
            return false;
        }

        if (typeof options.url != 'undefined' && !this._setUrl(options.url)) {
            return false;
        }

        if (typeof options.refreshTimeout != 'undefined' && !this._setRefreshTimeout(options.refreshTimeout)) {
            return false;
        }

        var d = new Date();
        this._timestamp = d.getTime();

        this.start();
    },

    _setResourceName: function (name)
    {
        if (!_.isString(name) || '' == _.str.trim(name)) {
            alert('Error: Resource name is not defined');
            return false;
        }
        this._resourceName = _.str.trim(name);
        return true;
    },

    _setObjectId: function (objectId)
    {
        if (_.isNaN(objectId) || 0 == objectId) {
            alert('Error: Object ID is not defined');
            return false;
        }
        this._objectId = parseInt(objectId);
        return true;
    },

    _validateUrl: function (url)
    {
        if (!_.isString(url) || '' == _.str.trim(url)) {
            alert('Error: Lock Refresh URL is not defined');
            return false;
        }
        return true;
    },

    _setUrl: function (url)
    {
        if (!this._validateUrl(url)) {
            return false;
        }
        this._url = _.str.trim(url);
        return true;
    },

    _setRefreshTimeout: function (timeout)
    {
        if (_.isNaN(timeout) || 0 == timeout) {
            alert('Error: Refresh timeout interval is wrong!');
            return false;
        }
        this._refreshTimeout = parseInt(timeout) * 1000;
        return true;
    },

    _sendRequest: function ()
    {
        if (!this._validateUrl(this._url)) {
            return false;
        }

        $.ajax({
            url: this._url + '?' + this._timestamp + '&resourceName=' + this._resourceName + '&objectId=' + this._objectId,
            type: 'GET',
            dataType: 'json'
        }).done(_.bind(this._requestOnDone, this));

        this._timestamp++;

        return true;
    },

    _requestOnDone: function (data, textStatus, jqXHR)
    {
        if (textStatus == 'success' && data.status == true) {
            this.start();
        }
    },

    start: function ()
    {
        if (!this._validateUrl(this._url)) {
            return false;
        }

        this.stop();
        this._timer = setTimeout(_.bind(this._sendRequest, this), this._refreshTimeout);

        return true;
    },

    stop: function ()
    {
        if (this._timer != null) {
            clearTimeout(this._timer);
        }
        this._timer = null;
        return true;
    }
};